diff --git a/crypto/src/asn1/anssi/ANSSINamedCurves.cs b/crypto/src/asn1/anssi/ANSSINamedCurves.cs
new file mode 100644
index 000000000..04e30bb07
--- /dev/null
+++ b/crypto/src/asn1/anssi/ANSSINamedCurves.cs
@@ -0,0 +1,123 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Math.EC;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Asn1.Anssi
+{
+ public class AnssiNamedCurves
+ {
+ private static ECCurve ConfigureCurve(ECCurve curve)
+ {
+ return curve;
+ }
+
+ private static BigInteger FromHex(string hex)
+ {
+ return new BigInteger(1, Hex.Decode(hex));
+ }
+
+ /*
+ * FRP256v1
+ */
+ internal class Frp256v1Holder
+ : X9ECParametersHolder
+ {
+ private Frp256v1Holder() {}
+
+ internal static readonly X9ECParametersHolder Instance = new Frp256v1Holder();
+
+ protected override X9ECParameters CreateParameters()
+ {
+ BigInteger p = FromHex("F1FD178C0B3AD58F10126DE8CE42435B3961ADBCABC8CA6DE8FCF353D86E9C03");
+ BigInteger a = FromHex("F1FD178C0B3AD58F10126DE8CE42435B3961ADBCABC8CA6DE8FCF353D86E9C00");
+ BigInteger b = FromHex("EE353FCA5428A9300D4ABA754A44C00FDFEC0C9AE4B1A1803075ED967B7BB73F");
+ byte[] S = null;
+ BigInteger n = FromHex("F1FD178C0B3AD58F10126DE8CE42435B53DC67E140D2BF941FFDD459C6D655E1");
+ BigInteger h = BigInteger.One;
+
+ ECCurve curve = ConfigureCurve(new FpCurve(p, a, b, n, h));
+ ECPoint G = curve.DecodePoint(Hex.Decode("04"
+ + "B6B3D4C356C139EB31183D4749D423958C27D2DCAF98B70164C97A2DD98F5CFF"
+ + "6142E0F7C8B204911F9271F0F3ECEF8C2701C307E8E4C9E183115A1554062CFB"));
+
+ return new X9ECParameters(curve, G, n, h, S);
+ }
+ };
+
+
+ private static readonly IDictionary objIds = Platform.CreateHashtable();
+ private static readonly IDictionary curves = Platform.CreateHashtable();
+ private static readonly IDictionary names = Platform.CreateHashtable();
+
+ private static void DefineCurve(
+ string name,
+ DerObjectIdentifier oid,
+ X9ECParametersHolder holder)
+ {
+ objIds.Add(Platform.ToLowerInvariant(name), oid);
+ names.Add(oid, name);
+ curves.Add(oid, holder);
+ }
+
+ static AnssiNamedCurves()
+ {
+ DefineCurve("FRP256v1", AnssiObjectIdentifiers.FRP256v1, Frp256v1Holder.Instance);
+ }
+
+ public static X9ECParameters GetByName(
+ string name)
+ {
+ DerObjectIdentifier oid = GetOid(name);
+ return oid == null ? null : GetByOid(oid);
+ }
+
+ /**
+ * return the X9ECParameters object for the named curve represented by
+ * the passed in object identifier. Null if the curve isn't present.
+ *
+ * @param oid an object identifier representing a named curve, if present.
+ */
+ public static X9ECParameters GetByOid(
+ DerObjectIdentifier oid)
+ {
+ X9ECParametersHolder holder = (X9ECParametersHolder)curves[oid];
+ return holder == null ? null : holder.Parameters;
+ }
+
+ /**
+ * return the object identifier signified by the passed in name. Null
+ * if there is no object identifier associated with name.
+ *
+ * @return the object identifier associated with name, if present.
+ */
+ public static DerObjectIdentifier GetOid(
+ string name)
+ {
+ return (DerObjectIdentifier)objIds[Platform.ToLowerInvariant(name)];
+ }
+
+ /**
+ * return the named curve name represented by the given object identifier.
+ */
+ public static string GetName(
+ DerObjectIdentifier oid)
+ {
+ return (string)names[oid];
+ }
+
+ /**
+ * returns an enumeration containing the name strings for curves
+ * contained in this structure.
+ */
+ public static IEnumerable Names
+ {
+ get { return new EnumerableProxy(names.Values); }
+ }
+ }
+}
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